Landing door



FIG. 1 is a rear perspective view of a landing door showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a right side elevational view, the left side elevational view being a mirror image thereof.

The broken line showing of various elements of the landing door is for environmental purposes only and forms no part of the claimed design. 

The ornamental design for a landing door, as shown and described. 